Filter device



Dec. 29, 1942. Y J. A. TOLMAN 2,306,985

FILTER DEVICE V Filed June 24, '1940 w w I t 2/ k R 2a [1V VEN TOR BY J); 17. 721 714.

A TTORNE rs.-

Patented Dec. 29, 1942 UNITED STATES PATENT OFFIE FILTER DEVICE J ohnl A. Tolman, Detroit, Mich.

Application June 24, 1940, Serial No. 342,048

Claims.

This invention relates to filter devices and more particularly to filter devices adapted for use in residence heating systems having oil burners.

One of the objects of the present invention is to provide an effective oil filter which is extremely simple in construction, can be quickly and easily disassembled for inspection, cleaning or repairs, and which can be manufactured in large quantities and at a relatively low cost.

Another object of the present invention is to provide an improved filter device which can be easily inserted into an oil line and removed therefrom, and in which standard plumbing connections are employed.

A further object of the invention is to provide an improved filter device insertable into a 'pipe line, which device can be partially or completely disassembled for cleaning or repair without disconnecting the pipe line.

Other objects and advantages of this invention will appear in the following description and appended claims, reference being had to the accompanying drawing forming a part of this specification wherein like reference characters designate corresponding parts in the several views.

Fig. l is a perspective view with parts broken away, said view illustrating a filter device embodying the present invention.

Fig. 2 is a top view of the device of Fig. 1.

Fig. 3 is a sectional View taken in the-direction of the arrows on the section plane passing through-the line 3-3 of Fig. 2.

Fig. 4 is a perspective view showing the filtering member removed from the filter'device.

Fig. 5 is a fragmentary sectional view taken in the direction of the arrows on the section plane passing through the line 5-5 of Fig. 3.

Fig. 6 is a fragmentary sectional view showing on an enlarged scale a portion encircled in Fig. l with a circle indicated bythe numeral 6.

Before explaining in detail the present invention it is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawing, since the invention is capable of other embodiments and of being practiced or carried out in various ways. Also it is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation, and it is not intended to limit the invention claimed herein beyond the requirements of the prior art.

In the drawing there is shown, by way of example, a filter device embodying the present invention. The device illustrated and described bowl with a port l5 and an outlet connection It communicating with the bowl through a relatively large opening. Connections [4 and 16 are provided with screw threads of the character standard for pipe connections. Around the edges of the opening there is provided a shouldered recess I8 adapted to receive filtering member I9. The filtering member l9 presents a unitary structure which is hereinafter described in detail. Said member I9 is fitted into the recess [8 rather loosely but without excessive clearance. and it can be shaken out therefrom without application of particular force.

The filtering member l9 is held in place by a retainer ring 2!], a gasket 2| being provided between said retainer ring and the filtering member. A V-shaped bracket 22 is arranged within the bowl I0, its apex portion 23 extending toward the bottom thereof, while its legs 24 engage the retainer ring 20 and are secured to the cover l3 with the aid of a plurality of screws 25 passing through the retainer ring 28, the gasket 2| and engaging the cover 53 at tapped holes provided therein.

To the apex portion 23 of the bracket 22 there is secured, such as by welding, a nut 26 which is adapted to be engaged by a screw 21 extending through the bottom of the bowl Ill and provided with a head 2111. By rotating the screw 21 in a proper direction the V-shaped bracket, and consequently the cover l3, and the bowl it] are tightly drawn together. The edges H of the bowl 10 are covered with a layer of soft material lla, while in the seat I2 there is provided a groove Hm. I prefer to tin or lead the edges 1 I, tin and lead or their commercial alloys being sufliciently soft for the screw 25 to force a por-' tion of this metal into the air filled groove l2a, providing a perfect seal between the cover l3 and the bowl l0. Sealing of the filtering member I9 is effected with the aid of the gasket 2|, as

explained. I

.shrunk on the strands.

It will now be clear in view of the foregoing that the oil entering through the inlet connection l4 passes through the port l5 and enters the bowl Ill. Because of gravity and to some extent due to the action of centrifugal force, the heavy impurities such as sand, metal particles, and water, fall to the bottom of the bowl It), while the oil with lighter impurities and solids in suspension continue their travel and pass through the filtering member l9 into the hollow portion 28 formed in said cover 13, and therefrom through the outlet connection [6 into the pipe line (not shown). In the process of such passage the oil is filtered to an extent determined by the filtering properties of the member 19.

The filtering member I9 comprises a plurality or quantity of strands preferably of cylindrical shape, which strands 30 are arranged in a longitudinal contact to provide filtering channels running parallel to the strands. Said strands are held together with the aid of a retaining shell 3| which is adapted to hold said strands 30 under the transverse compression sufficient to preserve the unitary character of the filtering member. The strands 30 are preferably made from extruded mineral material such as glass, their diameters being less than one thousandths of an inch. I prefer to use glass strands in some cases as fine as .0061 of an inch in diameter. Use of the glass or equivalent material is preferred, since the glass is a chemically inert material with respect to oil. However, in some instances very fine wires made of stainless steel or similar'material can be successfully used. The retaining shell 3| is made preferably of metal and may be heat The strands 3|] of the filter member may be retained together in compact operative relation by other means, such as by fusing the strands together along their lines of contact.

The filtering cake builds on the inlet face of the filtering member l9 and extends into the bowl IE3. For removing the cake it is only necessary to take out the screw 21 and then to remove the bowl It), the contents of which may be emptied into a pair which is arranged under the filter before cleaning. It should be particularly noted as an important advantage of the present invention that cleaning of my filter device may be efiected without removing the same from the pipe line to which it might be connected at [4 and Hi. When the bowl II] is removed as described the cake may be scraped ofi and the exposed parts wiped, the bowl washed and again put inplace. If it is desired to wash the filtering member E9, the screws 25 are taken out, the retainer ring 20 and the gasket 2| removed, after which the filtering member is can be easily taken out and washed preferably in kerosene or gasoline. The assembling of the filter device after cleaning is effected in the reverse order and is obvious from the above explanation and the drawing. Filter embers l9 are made of standard sizes and are interchangeable. By inserting a member having strands of difierent diameter of material, it is possible to adapt the filter device for various uses without introducing therein any irreparable changes.

The construction of my filtering device, as can be clearly seen from an examination of the drawing, is of such a character that the device is susceptible of being manufactured in large quantities and at a very low price. The cover I 3 may be made by a die casting process, while the bowl l0 may be stamped, spun or die cast. For screw 21 and nut 26 a standard bolt may be used, while the bracket 22 and the retainer ring 20 may be cheaply produced by stamping operations.

I claim:

1. A filter device comprising a bowl, a cover having a sealing seat adapted to receive the edges of said bowl, an intake and an outlet connection on said cover communicating with said bowl, a filtering member operatively arranged in said cover to separate said inlet and outlet connections, a seal between said filtering member and said cover, a bracket member arranged within said bowl and detachably secured to said cover, and means connecting said bracket to said bowl to produce sealing pressure between the edges thereof and the sealing seat of said cover.

2. A filter device comprising a bowl, a cover having a sealing seat adapted to receive the edgesof said bowl, an intake and an outlet connection on said cover communicating with said bowl, a filtering member operatively arranged in said cover to separate said inlet and said outlet connections, a seal between said filtering member and said cover, a bracket member arranged within said bowl and detachably secured to said cover adjacent said seal, and threaded means connecting said bracket to said bowl to produce sealing pressure between the edges thereof and the sealing seat of said cover.

3. A filter device comprising a bowl, a covering having a sealing seat adapted to receive the edges of said bowl, an intake and an outlet connection on said cover communicating with said bowl, a filtering member operatively arranged in said cover to separate said inlet and said outlet connections, a V-shaped bracket having its legs detachably secured to said cover and its apex portion extending adjacent the bottom of said bowl, and a screw threaded member engaging said bowl and said bracket at its apex portion and adapted to hold said bowl and said cover together.

4. A filter device comprising a bowl, a cover having a sealing seat adapted to receive the edges of said bowl, an intake and an outlet connection on said cover communicating with said bowl, a filtering member operatively arranged in said cover to separate said inlet and said outlet connections, a bracket member arranged within said bowl and secured to said cover adjacent the margin of said filtering member, and a screw threaded member'engaging said bowl and said bracket and adapted to hold said bowl and said cover together and to regulate the sealing pres-.

sure therebetween.

5. A filter device comprising a bowl, a cover having a sealing seat adapted to receive the edges of said bowl, an intake and an outlet connection on said cover communicating with said bowl, a filtering member operatively arranged in said cover to separate said inlet and said outlet connections, a seal between the marginal portion of said filtering member and said cover, and a bracket member within said bowl supporting said filtering member at its marginal portion and also supporting said bowl.

JOHN A. TOLMAN. 

